Running many child processes in parallel

beginner

Part of my program creates a bunch of child processes and has them run in the background, roughly as follows

class Runner : IDisposable {
  ConcurrentBag<Process> Processes = []
  ...
  void Execute() {
    ...
    Parallel.ForEach(items, item => {
      string Command = ...
      Processes.Add(Process.Start(Command));
    }
  }
  ...
  void Dispose() {
    foreach (var p in Processes) {
      // ?
    }
  }
}

class Runner : IDisposable {
  ConcurrentBag<Process> Processes = []
  ...
  void Execute() {
    ...
    Parallel.ForEach(items, item => {
      string Command = ...
      Processes.Add(Process.Start(Command));
    }
  }
  ...
  void Dispose() {
    foreach (var p in Processes) {
      // ?
    }
  }
}

I want to know
- What's the proper way to dispose currently running processes in case it's needed (can I simply try

p.Kill()

p.Kill()

followed by

p.Dispose()

p.Dispose()

?)
- Is there a way to limit the number of threads spawned by foreach in this scenario?

C#•3mo ago•

31 replies

sharaths21312

Running many child processes in parallel

beginner

Part of my program creates a bunch of child processes and has them run in the background, roughly as follows

class Runner : IDisposable {
  ConcurrentBag<Process> Processes = []
  ...
  void Execute() {
    ...
    Parallel.ForEach(items, item => {
      string Command = ...
      Processes.Add(Process.Start(Command));
    }
  }
  ...
  void Dispose() {
    foreach (var p in Processes) {
      // ?
    }
  }
}

class Runner : IDisposable {
  ConcurrentBag<Process> Processes = []
  ...
  void Execute() {
    ...
    Parallel.ForEach(items, item => {
      string Command = ...
      Processes.Add(Process.Start(Command));
    }
  }
  ...
  void Dispose() {
    foreach (var p in Processes) {
      // ?
    }
  }
}

I want to know
- What's the proper way to dispose currently running processes in case it's needed (can I simply try

p.Kill()

p.Kill()

followed by

p.Dispose()

p.Dispose()

?)
- Is there a way to limit the number of threads spawned by foreach in this scenario?

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